2019-08-27T17:32:45.229135Z [twisted.internet.defer#critical]
        Traceback (most recent call last):
          File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
            self.run()
          File "/usr/lib/python3.6/threading.py", line 864, in run
            self._target(*self._args, **self._kwargs)
          File "/home/david/src/cowrie/cowrie-env/lib/python3.6/site-packages/twisted/_threads/_threadworker.py", line 46, in work
            task()
          File "/home/david/src/cowrie/cowrie-env/lib/python3.6/site-packages/twisted/_threads/_team.py", line 190, in doWork
            task()
        --- <exception caught here> ---
          File "/home/david/src/cowrie/cowrie-env/lib/python3.6/site-packages/twisted/python/threadpool.py", line 250, in inContext
            result = inContext.theWork()
          File "/home/david/src/cowrie/cowrie-env/lib/python3.6/site-packages/twisted/python/threadpool.py", line 266, in <lambda>
            inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
          File "/home/david/src/cowrie/cowrie-env/lib/python3.6/site-packages/twisted/python/context.py", line 122, in callWithContext
            return self.currentContext().callWithContext(ctx, func, *args, **kw)
          File "/home/david/src/cowrie/cowrie-env/lib/python3.6/site-packages/twisted/python/context.py", line 85, in callWithContext
            return func(*args,**kw)
          File "/home/david/src/cowrie/src/backend_pool/pool_service.py", line 286, in producer_loop
            self.__producer_create_guests()
          File "/home/david/src/cowrie/src/backend_pool/pool_service.py", line 248, in __producer_create_guests
            dom, snap, guest_ip = self.qemu.create_guest(self.is_ip_free)
          File "/home/david/src/cowrie/src/backend_pool/libvirt/backend_service.py", line 101, in create_guest
            dom, snapshot = backend_pool.libvirt.guest_handler.create_guest(self.conn, guest_mac, guest_unique_id)
          File "/home/david/src/cowrie/src/backend_pool/libvirt/guest_handler.py", line 52, in create_guest
            if not backend_pool.libvirt.snapshot_handler.create_disk_snapshot(base_image, disk_img):
          File "/home/david/src/cowrie/src/backend_pool/libvirt/snapshot_handler.py", line 17, in create_disk_snapshot
            out = subprocess.run(['qemu-img', 'create', '-f', 'qcow2', '-b', source_img, destination_img], capture_output=True)
          File "/usr/lib/python3.6/subprocess.py", line 423, in run
            with Popen(*popenargs, **kwargs) as process:
        builtins.TypeError: __init__() got an unexpected keyword argument 'capture_output'